Evaluate the limits. $$f(x) = \begin{cases} 10 x+9 & x\leq 1 \\ x^2-10 & x>1 \end{cases}$$ Enter DNE if the limit does not exist.

$\displaystyle \lim_{x \to 1^-} f(x)$ =

$\displaystyle \lim_{x \to 1^+} f(x)$ =

$\displaystyle \lim_{x \to 1} f(x)$ =